Motion-based video retargeting with optimized crop-and-warp

Yu Shuen Wang, Hui Chih Lin, Olga Sorkine, Tong Yee Lee

研究成果: Article同行評審

79 引文 斯高帕斯(Scopus)

摘要

We introduce a video retargeting method that achieves high-quality resizing to arbitrary aspect ratios for complex videos containing diverse camera and dynamic motions. Previous content-aware retargeting methods mostly concentrated on spatial considerations, attempting to preserve the shape of salient objects in each frame by removing or distorting homogeneous background content. However, sacrificeable space is fundamentally limited in video, since object motion makes foreground and background regions correlated, causing waving and squeezing artifacts. We solve the retargeting problem by explicitly employing motion information and by distributing distortion in both spatial and temporal dimensions. We combine novel cropping and warping operators, where the cropping removes temporally-recurring contents and the warping utilizes available homogeneous regions to mask deformations while preserving motion. Variational optimization allows to find the best balance between the two operations, enabling retargeting of challenging videos with complex motions, numerous prominent objects and arbitrary depth variability. Our method compares favorably with state-of-the-art retargeting systems, as demonstrated in the examples and widely supported by the conducted user study.

原文English
文章編號90
期刊ACM Transactions on Graphics
29
發行號4
DOIs
出版狀態Published - 2010

All Science Journal Classification (ASJC) codes

  • Computer Graphics and Computer-Aided Design

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